<template>
  <div class="login_container">
    <div class="login-box">
      <div class="avatar-box">
        <img src="../assets/logo.png" alt="" />
      </div>
      <el-form
        label-width="0px"
        :rules="loginFormRules"
        class="login_form"
        :model="loginForm"
        ref="loginFormRef"
        @keyup.enter.native="login"
      >
        <el-form-item prop="username">
          <el-input
            prefix-icon="iconfont icon-user"
            v-model="loginForm.username"
          ></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            prefix-icon="iconfont icon-3702mima"
            v-model="loginForm.password"
            type="password"
          ></el-input>
        </el-form-item>
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  methods: {
    login() {
      this.$refs.loginFormRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await this.$http.post('/login', this.loginForm)
        if (res.meta.status !== 200) return this.$message.error('登录失败！')
        this.$message.success('登录成功！')
        // 1. 将登录成功之后的 token，保存到客户端的 sessionStorage 中
        window.sessionStorage.setItem('token', res.data.token)
        //   1.1 项目中除了登录之外的其他API接口，必须在登录之后才能访问
        //   1.2 token 只应在当前网站打开期间生效，所以将 token 保存在 sessionStorage 中
        // 2. 通过编程式导航跳转到后台主页，路由地址是 /home
        this.$router.push('/home')
      })
    },
    resetLoginForm() {
      // console.log(this)
      this.$refs.loginFormRef.resetFields()
    },
  },
  data() {
    return {
      // 表单输入数据绑定
      loginForm: {
        username: 'admin',
        password: '123456',
      },
      // 表单验证
      loginFormRules: {
        // 验证用户
        username: [
          { required: true, message: '请输入用户名称', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            message: '长度在 3 到 10 个字符',
            trigger: 'blur',
          },
        ],
        // 验证密码
        password: [
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          {
            min: 6,
            max: 15,
            message: '长度在 6 到 15 个字符',
            trigger: 'blur',
          },
        ],
      },
    }
  },
}
</script>
<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
  .login-box {
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    .avatar-box {
      height: 130px;
      width: 130px;
      border: 1px solid #eee;
      border-radius: 50%;
      padding: 10px;
      box-shadow: 0 0 10px #ddd;
      position: absolute;
      left: 50%;
      transform: translate(-50%, -50%);
      background-color: #fff;
      img {
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: #eee;
      }
    }
    .login_form {
      position: absolute;
      bottom: 0;
      width: 100%;
      padding: 0 20px;
      box-sizing: border-box;
      .btns {
        display: flex;
        justify-content: flex-end;
      }
    }
  }
}
</style>
